epidemics and plagues in western Africa, Cameroon, Nigeria, South Sudan, Chad, the Democratic Republic of the Congo, Ethiopia, Ivory Coast, Niger, Uganda, Afghanistan, Bolivia, Haiti, El Salvador, Honduras, Guatemala and Nicaragua;
epidemieën en plagen in West-Afrika, Kameroen, Nigeria, Zuid-Soedan, Tsjaad, de Democratische Republiek Congo, Ethiopië, Ivoorkust, Niger, Oeganda, Afghanistan, Bolivia, Haïti, El Salvador, Honduras, Guatemala en Nicaragua;